Chevrolet 2007 Avalanche Owner's Manual page 310

Radio Data System (RDS)
The audio system has a Radio Data System
(RDS). The RDS feature is available for use only
on FM stations that broadcast RDS information.
This system relies upon receiving specific
information from these stations and will only work
when the information is available. While the
radio is tuned to an FM-RDS station, the station
name or call letters will appear on the display.
In rare cases, a radio station may broadcast
incorrect information that will cause the radio
features to work improperly. If this happens,
contact the radio station.
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XM™ Satellite Radio Service
XM™ is a satellite radio service that is based in
the 48 contiguous United States and Canada.
XM™ offers a large variety of coast-to-coast
channels including music, news, sports, talk,
traffic/weather (U.S. subscribers), and children's
programming. XM™ provides digital quality
audio and text information that includes song title
and artist name. A service fee is required in
order to receive the XM™ service. For more
information, contact XM™; In the U.S. at
www.xmradio.com or call 1-800-852-XMXM (9696)
or in Canada at www.xmradio.ca or call
1-877-GET-XMSR (438-9677).